ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
A combined model is presented that predicts the non-uniform distribution of Al3Xdispersoid particles in commercial aluminium alloys containing zirconium and scandium and usesthese predictions as inputs to a simple recrystallization model. The recrystallization model relies onknowledge of the stored energy in the sub-structure after deformation and this has been measuredusing electron backscattered diffraction (EBSD) techniques. The recrystallization model is based onthe concept that partial recrystallization results from the non-uniform distribution of dispersoidparticles due to their precipitation from a segregated cast structure. The model has been used todevise an improved homogenization treatment for AA7050, which uses an isothermal hold duringheat up to maximize dispersoid nucleation. It has also been applied to predict the effect of scandiumadditions on recrystallization, investigate the factors that control the through thickness variation inrecrystallized fraction, and interpret the results of experiments where the effect of strain rate havebeen studied
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/16/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.550.45.pdf
